How much a 30 cm heliar should weighs ?

[TML74]

I have found an heliar ?0 cm but it is supposed to be a 50 cm f/4,5 but as fas as I know it doesn't exist, it should be a 30 cm or a 60 cm, probably a 30 cm... so knowing the weighs of a 30 cm could help to identify which lens it is...
Thank you for your help.
Thierry M.L.

[DrTang]

2 or 3 pounds in shutter I'm guessing.. I'll weigh it when I get home

[DrTang]

3 pounds / 6ounces - with a #5 compound shutter

[TML74]

So it must be a 30 cm, thank you, Thierry M.L.

[Tim Deming]

Measuring the lens glass diameter will also sort out this question quickly. A 60cm heliar has glass that is substantially larger than the 30cm.

Cheers

Tim

[TML74]

"Measuring the lens glass diameter" on a photo without reference it is not so easy... but it is definitivly a 30 cm...
Thank you.

[Tim Deming]

How do you weigh a lens in a photo?

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Tim

[Taija71A]

How do you weigh a lens in a photo? �� Tim

Exactly...

I too just found a Heliar! :p

[TML74]

How do you weigh a lens in a photo?
I can't here is why I ask here...
Thierry M.L.